RRS John Murray JM2A/81 (B/2/81)
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS John Murray (74MJ) |
| Cruise identifier | JM2A/81 (B/2/81) |
| Cruise period | 1981-03-16 — 1981-03-24 |
| Status | Completed |
| Port of departure | Barry, United Kingdom |
| Port of return | Plymouth, United Kingdom |
| Purpose | Research |
| Objectives | 1) To continue the monitoring cruises in the Bristol Channel and Severn Estuary
2) To analyse the seawater and suspended particulate matter for trace metals in Swansea Bay as part of a continuing study of water quality in the area of Scarweather Sands and its association with the transportation of toxic contaminant bound to particulate matter from areas known for effluent discharge. 3) To test the new codend systems, opening and closing devices and new configurations of equipment fitted to the Double Lowestoft Longhurt System. |
| Chief scientist | Bob Williams (Institute of Marine Environmental Research, Plymouth) |
| Cruise report |  (0.10 MB) |
| Ocean/sea areas | |
| General | Irish Sea and St. George's Channel |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | |
| Water bottle stations | Quantity: number of stations = 15 Description: surface only |
| Contamination | |
| Suspended matter | |
| Biology and fisheries | |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of stations = 2 |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | |
| Particulate organic matter (inc POC, PON) | Quantity: number of stations = 2 |
| Phytoplankton | Quantity: number of stations = 2 |
| Zooplankton | Quantity: number of stations = 4 Description: energy transfers,population structures |
| Seston | Quantity: number of stations = 2 |
| Pelagic bacteria/micro-organisms | Quantity: number of samples = 50 |
